Electromagnetic warp stop-motion for looms



(.No Model.)

. A; o. SHUT-TLEWORTH,

ELECTROMAGNETIC WARP STOP MOTION FOR 1100MB.

P atented No-v. 3, 1896.

INVENI'OR WITNESSES:

mus PETERS cow, muroLrr-m, wasnmemn. n. c.

UNITED STATES PATENT OFFICE.-

ALPHEUS O. SHUTTLEYVORTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TOGEORGE DRAPER' 8: SONS, OF HOPEDALE, MASSACHUSETTS.

ELECTROMAGNETIC WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 570,738, dated November3, 1896.

Application filed April 30,1894. Serial No. 509,446. (No model.)

To all whom it may concern.-

Be it known that I, ALPHEUS C. SHUTTLE- WORTH, a citizen of the UnitedStates, residing at Philadelphia, in the county of Philadelphia andStateof Pennsylvania, have invented certain new and useful Improvements inElectromagnetic WVarp Stop-Motions for Looms; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention has reference to a device for automatically operating thestopping mechanism of a loom electrically at the breaking or sagging ofany of the warp-threads.

' The invention consists in the use of a heddle-frame for the wireheddles, provided with either one or two permanent magnets, but where asingle permanent magnet is used the heddle-frame is provided with apartiallyinsulated heddle-shaft. The aforesaid parts operate inconjunction with an electrical current by means of the 'heddle-wirescoacting with an electromagnet and such mechanical parts are arranged todisplace the shipper-lever from the keepernotch, and thereby stop theloom. v 7

I have illustrated the invention by drawings herewith, in which Figure 1is a side elevation, partly in section, of a form of loom, showing theprincipal parts of a loom, the electrical connections, and mechanicalmeans employed in moving the shipper-lever. Fig. 2 is a face view of aheddle-frame constructed with a single permanent magnet and illustratingthe positions occupied by the electrical and mechanical parts directlyassociated with it. This figure also shows the two positionsof the wireheddles when the heddle-frame is at its highest position. Those wireheddles carrying broken or sagging threads are shown clinging to thepermanent magnet. Fig. 3 is a similar view showing the lowest positionassumed by the heddle-frame and provided with but a single permanentmagnet, illustrating also the positions of the immediately-associatedelectrical and mechanical parts used in connection with it, also showingthe two positions of the magnets, this View showing also the electricaland mechanical parts operating with it. Fig. 6 is a vertical section aty 'y of Fig. 5. Fig. 7 is an enlarged cross-section of a permanentmagnet. Fig. 8 is an enlarged cross-section of the partially-insulatedheddle-shaft. Fig. 9 represents a single heddle-wire. The heddle-shaftsare shown in cross-section in the eyes thereof.

Similar letters refer to like parts.

In the drawings, A represents the frame of a loom; B, the heddle-frames;M, the warpbeam; S, the lathe; R, the whip-roll; H, the treadles; K, theshipper-lever; c, the wire heddles, and (Z the warp-threads. All of themechanical parts referred to are constructed and similarly used as inthe ordinary form of a strong permanent magnet, and so is the'bottomrail b when constructed in the form of the modification, Fig. 5.

The two heddle-shafts e 6, upon which the wire heddles c are strung whenusing a single permanent magnet, as in Figs. 2 and 3, differ from eachother, 6, located in the'frame at the top, being made in the form of aninverted V. The entire surface of the upper bar 6' is insulated, as e,excepting the inverted-V-shaped portion. (See Fig. 8.) The bottom shaft6 is of the form used in all heddle-frames, not being in any mannerinsulated from the wire heddles 0, but they are directly connectedby IOOThe connection Z may be made to any number of heddle-framcs from aparent stem leading to the electric battery and thoroughly flexible inorder to allow independent movement of any of the series ofheddle-frames.

Secured firmly to the loom-frame A is a plate 9, corresponding in widthto the combined thickness of the number of heddleframes used, and it isconstructed with flanges g projecting at a right angle from its face atits extreme upper and lower ends, the upper flange engaging thespring-arm 71, connected to the permanent magnet b, when the heddleframeis at its highest position, and the lower flange g engaging thespring-arm 02, connected to the upper partially-insulated heddle-shaft eat the lowest position assumed by the heddle-frarne. These shafts andspringarms are constructed and act similar in each of the heddle-framesin use where a single.

permanent magnet forms the top rail of the heddle-frame.

An electromagnet O is located on the frame of the loom in proximity tothe shipper-lever K and the lathe S. The said lathe is provided with aslotted plate 3 for engaging the lever 4', supported normally by thespring 'U. The lever 0- has pivoted to it a foot-piecet directly overthe electromagnet 0.

As before stated, an electric battery or other source of electricity tooperate the device is shown. located at L and connected by Z through theelectromagnet to the flanged plate g, secured on the loom-frame, and theopposite side of the battery is connected by wires Z to theheddle-frames.

At the highest position of a heddle-frame all of the heddle wires 0holding sound threads rest on the inverted-V-shaped edge of thepartly-insulated heddle-shaft e, and all those heddle-wires c carryingunsound or broken threads will adhere to the top magnet, being attractedby the magnetism, thereby completing the electric circuit through thearms and upper flange of the plate g, through the electromagnet to thebattery.

At the lowest position of the heddle-frame all wire heddles a holdingsound threads will be forced against the permanent magnet b and awayfrom the partially-insulated heddle-shaft e by the tension of thewarp-threads (Z, and all those wire heddles marked 0 carrying unsound orbroken warp-threads will instantly fall by reason of their own gravityon the shaft 6, thereby completing an electric circuit by a similarengagement of the springarm of the partially-insulated heddle-shaft eengaging with the lower flange of the plate 9 in a similar manner andmeans, as before explained. v

When either of the circuits above described is formed, the electromagnetbeing in the circuit attracts the pivoted plate t, connected to thespring-arm r in line to engage the projection r by the slotted plate 8and force the nose of the spring-arm 7' against the proj ection 7; ontheshipper-lever K, andthereby dislodge the latter from thekeeper-notch, so that the loom will be able to make buta single pickwhen the circuit is completed.

The replacing of the shipper-lever inits proper position to run the loomwill arrange the knocking-off spring-lever r instantly in place, readyto be again operated upon. The

spring-lever 0', when struck by the lathe,

slides forward in the keeper n.

For weaving with heavy warp-threads and to insure greater efliciency inthe completing of the electric circuits I dispense with thepartly-insulated heddle-shaft e, using uninsulated and similarly-shapedshafts for the heddle-wires, in which case the bottom rail 12 of each ofthe heddle-frames would also be constructed with a permanent magnet, thesame as the top rail 19. (See Figs. 5 and 6.) Such construction wouldsimply require the lengthening of the plates g and supplying the lowerpermanent magnet b with a spring-arm n, the same as the top magnet, andthe circuits produced at the highest position of the heddle-frame wouldbe through the wire heddles 0, plate g, and electromagnet O, by means ofthe wires, to the battery at one end, and the wire heddles, lowerheddle-shaft c, and wires Z to the battery L upon the opposite end.

I claim- 1. In an electric warp stop-motion for looms, the combinationwith a heddle-frame, of a permanent magnet carried thereby, a series ofheddles normally held out of contact with said permanent magnet by thetension of the warp-threads, a source of electrical energy with whichsaid permanent magnet andheddles are in circuit,-an electromagnet in circuit with said permanent magnet and beddles, and a shipper-levercontrolled by said electromagnet so that when tension on any one of theseries of heddles is relaxed so as to allow contact with said permanentmagnet the circuit is completed and the loom stopped.

2. In an electric warp stop-motion forlooms, the combination with aheddle-frame, of a permanent magnet carried thereby, a series of heddlesnormally held out of contact with said permanent magnet by the tensionof the warp-threads, a source of electrical energy with which saidpermanent magnet and heddles are in circuit, an electromagnet in circuitwith said permanent magnet and heddles, a spring knockoff levercontrolled by said electromagnet, a shipper-lever actuated by saidknock-off lever, so that when tension'on any one of the series ofheddles is relaxed so as to allow contact with said permanent magnet thecircuit is completed and the loom stopped.

3. In an electric warp stop-motion for looms, the combination with aheddle-frame, of a permanent magnet carried thereby, a series of heddlesnormally held out of contact with said permanent magnet by the tensionof the war -threads a source of electrical ener with which saidpermanent magnet and heddles are in circuit, an electromagnet' incircuit with said permanent magnet and heddles, a spring knock-cit levercontrolled by said electromagnet, a shipper-lever actuated by saidknock-off lever, connection between said knock-off lever and the latheby means of which the said knock-off lever is moved at the forwardmovement of the lathe so as to throw the shipper-lever and stop the loomwhen tension on any one of the heddles is relaxed so as to allow contactwith the permanent magnet and completion of the circuit.

4. In an electric warp stop-motion for looms, the combination with aheddle-frame, of a permanent magnet carried thereby, a series of heddlesnormally held out of contact with said permanent magnet by the tensionof the warp-threads, a source of electrical energy with which saidpermanent magnet and heddles are in circuit,'a shipper-lever, a knockofflever to actuate the shipper-lever mounted on the loom-frame so as to benormally out of the path of movement of the lathe, and an electromagnetin circuit with said permanent magnet and heddles to attract saidknock-oft lever and throw it into the path of said lathe when thecircuit is completed by the slackenin g of a warp-thread and theresultant movement of a heddle into contact with the permanent magnet. V

5. In an electric warp stop-motion for looms, the combination with aheddle-frame, of a permanent magnet carried thereby, a heddleshaftinsulated on its bottom and two sides, a series of heddles normally heldout of contact with said magnet by the tension of the warp-threads, asource of electrical energy with which said permanent magnet and heddlesare in circuit, a conductor-plate on the loom-frame with which saidheddle-frame contacts at each shed, a spring knock-off lever to actuatethe shipper-lever mounted in a slide on the loom-frame normally out ofthe same and throw it into-the path of movement of the lathe when saidelectromagnet is energized by the completion of the circuit through Vthe slackening of the tension of any one of the warp-threads and theresultant movement of a heddle, and a projection on the lathe to engagesaid knock-01f lever and force it forward to actuate the shipper-leverand stop the loom.

6. In an electric warp stop-motion for looms, the combination with aheddle-frame, of one or more permanent magnets carried thereby, a seriesof heddles normally held out of contact with said permanent magnets bythe tension of the warp-threads, a source of electrical energy withwhich said magnets and heddles are in circuit, an electromagnet incircuit with said heddles and said permanent magnets, a spring knock-offlever controlled by said electromagnet, a projection on the lathe whichengages the said knock-01f lever when the latter is thrown into the pathof movement of the lathe by the action of the electromagnet, ashipper-lever which is actuated by said knock-off lever to stop theloom, a condoctor-plate on the loom-frame, spring-arms on theheddle-frame which contact with said conductor-plate at the end of eachshed and complete the circuit when any one of the heddles is thrown fromits normal position by the slackening of the tension of a Warp-thread.

In testimony whereof I affix my signature in presence of two witnesses.

ALPHEUS C. SHUTTLEWOR TH.

Witnesses:

WM. 13. HILT,. LEWIS F. BROUT.

